The judgment of the trial court is affirmed on the carefully considered opinion of theDistrict Court, 197 F.Supp. 806. See also Palmer v. United States Civil Service Commission, 7 Cir., 297 F.2d 450, cert. denied, State of Ill. v. United States Civil Service Commission, 369 U.S. 849, 82 S.Ct. 932, 8 L.Ed.2d 8.